[some young guy]

Originally Posted by Frank(Aflak)

The more succesful pneumatic shifting trannys don't actually slide gears back and forth -- this is problematics for exactly the reason you just described. Look at the Technokat's 2003 tranny for an example of how to build a shift on the fly tranny (i'm sure there are others, but our bot was involved in an unhealthy (at least for our bot) relationship with the Technokat's bot, so I remember theirs the most). Instead ofmoving gears, they moved a dog which basically selected which gear (the one for high gear or the one for low gear) was locked to the driveshaft, allowing the gear that wasn't in use to slide on the driveshaft. They used a dog, three massive prongs on each side, slightly angled, that mated with three depressions on each gear. Neither gear was locked to the shaft, but the dog was, so by engaging the dog with the gear they wanted they locked that gear to the shaft allowing the other to just spin.

I'm not sure how clear that was, go look up pics from last year for a better idea.

i no wat u mean by the cats transmiton, that cleard it up about a 64th......o jeeze i've been at robotics to much